Seamless steel tubes are made by piercing a solid round steel billet, resulting in tubes without any visible welds on the surface. Depending on the production method, seamless steel tubes can be categorized into...Hot-rolled Seamless Steel Pipe、Cold Rolled Seamless Steel Pipe、Cold Drawn Seamless Steel PipeExtruded seamless steel tubes, jacking pipes, etc. Seamless steel tubes are divided into round and non-round shapes based on cross-sectional shape. Non-round tubes come in various complex shapes such as square, elliptical, triangular, hexagonal, melon-shaped, star-shaped, and winged tubes. The large diameter reaches 900mm, while the small diameter is 4mm. Depending on their application, they are available in different types.Thick-walled Seamless Steel PipeAndThin-walled Seamless Steel PipeSeamless steel tubes are primarily used in the oil industry.Geological Drilling PipeCracking pipes, boiler tubes, bearing tubes for petrochemical use, and high-precision structural steel tubes for automotive, tractor, and aviation applications.